
Crick and Watson's DNA Molecular Model
1953
1953
1953
1942
1945
1948-1953
1955
1950-1952
1946-1950
1949
1949
1945-1955
1948-1950
1948-1953
1945
1948
1946
1955
1955
1943
1948
2000-100 BCE
1945
1940
1947
1947
1940
1955
1948
1955
1940
circa 1955
1942
1946
1953
1940
1950
1953
1950
1951
1945-1955
1955
1951
1955; 1830
circa 1950
1950
1948
1951
1955
1939-1955
1955